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7. √5 percent of 5√5 =

　　A. 0.05

　　B. 0.25

　　C. 0.5

　　D. 2.5

　　E. 25

Correct Answer: B

Explanation:

We can write the statement mathematically, using x to mean ‘of’ and /100 for ‘per cent’. So ( √5/100) x 5√5 = 5 x 5 /100 = 0.25

8. If pqr = 1 , rst = 0 , and spr = 0, which of the following must be zero?

　　A. P

　　B. Q

　　C. R

　　D. S

　　E. T

　　Correct Answer: D

Explanation:

If pqr = 1, none of these variable can be zero. Since spr = 0 , and since p and r are not zero, s must be zero. (Note that although rst = 0, and so either s or t must be zero, this is not sufficient to state which must be zero)

9. -20 , -16 , -12 , -8 ....

In the sequence above, each term after the first is 4 greater than the preceding term. Which of the following could not be a term in the sequence?

　　A. 0

　　B. 200

　　C. 440

　　D. 668

　　E. 762

Correct Answer: E

Explanation：

All terms in the sequence will be multiples of 4. 762 is not a multiple of 4

延伸阅读：

SAT语法练习题及解析（二十）

SAT数学练习题（一）

SAT数学练习题（二）

更多阅读资料：
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